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Osborne Browne
From the first time I used an HP calculator with reversed polish notation at college, I became attached to the system. The multiple stack levels allow for easy calculations, especially when dealing with coordinates conversion between different units.
I have been using microsurvey cad and microsurvey calculator for many years, the calculator is very versatile and easy to use, I am now semi retired but is still drawn to it for everyday use.
Osborne Browne
